Holocene climatic fluctuations and positioning of the Southern Hemisphere westerlies in Tierra del Fuego (54° S), Patagonia
Recent advances in the chronology and the palaeoclimatic understanding of Antarctic ice core records point towards a larger heterogeneity of latitudinal climate fluctuations than previously thought. Thus, realistic palaeoclimate reconstructions rely in the development of a tight array of well-constr...
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fteawag:oai:dora:eawag_6515 2024-09-15T17:43:09+00:00 Holocene climatic fluctuations and positioning of the Southern Hemisphere westerlies in Tierra del Fuego (54° S), Patagonia Waldmann, Nicolas Ariztegui, Daniel Anselmetti, Flavio S. Austin Jr., James A. Moy, Christopher M. Stern, Charles Recasens, Cristina Dunbar, Robert B. 2010 https://doi.org/10.1002/jqs.1263 eng eng Wiley Journal of Quaternary Science--J. Quat. Sci.--journals:1767--0267-8179--1099-1417 eawag:6515 journal id: journals:1767 issn: 0267-8179 e-issn: 1099-1417 ut: 000283697100003 local: 14676 scopus: 2-s2.0-77958109584 doi:10.1002/jqs.1263 high-latitude palaeoclimate orbital forcing lacustrine basins mid Holocene optimum Little Ice Age tephrochronology Text Journal Article 2010 fteawag https://doi.org/10.1002/jqs.1263 2024-08-05T03:04:28Z Recent advances in the chronology and the palaeoclimatic understanding of Antarctic ice core records point towards a larger heterogeneity of latitudinal climate fluctuations than previously thought. Thus, realistic palaeoclimate reconstructions rely in the development of a tight array of well-constrained records with a dense latitudinal coverage. Climatic records from southernmost South America are critical cornerstones to link these Antarctic palaeoclimatic archives with their South American counterparts. At 54° S on the Island of Tierra del Fuego, Lago Fagnano is located in one of the most substantially and extensively glaciated regions of southernmost South America during the Late Pleistocene. This elongated lake is the largest (∼110 km long) and non-ice covered lake at high southern latitudes. A multi-proxy study of selected cores allows the characterisation of a Holocene sedimentary record. Detailed petrophysical, sedimentological and geochemical studies of a complete lacustrine laminated sequence reveal variations in major and trace elements, as well as organic content, suggesting high variability in environmental conditions. Comparison of these results with other regional records allows the identification of major known late Holocene climatic intervals and the proposal for a time for the onset of the Southern Westerlies in Tierra del Fuego. These results improve our understanding of the forcing mechanisms behind climate change in southernmost Patagonia. Article in Journal/Newspaper Antarc* Antarctic ice core Tierra del Fuego DORA Eawag Journal of Quaternary Science 25 7 1063 1075 |
institution |
Open Polar |
collection |
DORA Eawag |
op_collection_id |
fteawag |
language |
English |
topic |
high-latitude palaeoclimate orbital forcing lacustrine basins mid Holocene optimum Little Ice Age tephrochronology |
spellingShingle |
high-latitude palaeoclimate orbital forcing lacustrine basins mid Holocene optimum Little Ice Age tephrochronology Waldmann, Nicolas Ariztegui, Daniel Anselmetti, Flavio S. Austin Jr., James A. Moy, Christopher M. Stern, Charles Recasens, Cristina Dunbar, Robert B. Holocene climatic fluctuations and positioning of the Southern Hemisphere westerlies in Tierra del Fuego (54° S), Patagonia |
topic_facet |
high-latitude palaeoclimate orbital forcing lacustrine basins mid Holocene optimum Little Ice Age tephrochronology |
description |
Recent advances in the chronology and the palaeoclimatic understanding of Antarctic ice core records point towards a larger heterogeneity of latitudinal climate fluctuations than previously thought. Thus, realistic palaeoclimate reconstructions rely in the development of a tight array of well-constrained records with a dense latitudinal coverage. Climatic records from southernmost South America are critical cornerstones to link these Antarctic palaeoclimatic archives with their South American counterparts. At 54° S on the Island of Tierra del Fuego, Lago Fagnano is located in one of the most substantially and extensively glaciated regions of southernmost South America during the Late Pleistocene. This elongated lake is the largest (∼110 km long) and non-ice covered lake at high southern latitudes. A multi-proxy study of selected cores allows the characterisation of a Holocene sedimentary record. Detailed petrophysical, sedimentological and geochemical studies of a complete lacustrine laminated sequence reveal variations in major and trace elements, as well as organic content, suggesting high variability in environmental conditions. Comparison of these results with other regional records allows the identification of major known late Holocene climatic intervals and the proposal for a time for the onset of the Southern Westerlies in Tierra del Fuego. These results improve our understanding of the forcing mechanisms behind climate change in southernmost Patagonia. |
format |
Article in Journal/Newspaper |
author |
Waldmann, Nicolas Ariztegui, Daniel Anselmetti, Flavio S. Austin Jr., James A. Moy, Christopher M. Stern, Charles Recasens, Cristina Dunbar, Robert B. |
author_facet |
Waldmann, Nicolas Ariztegui, Daniel Anselmetti, Flavio S. Austin Jr., James A. Moy, Christopher M. Stern, Charles Recasens, Cristina Dunbar, Robert B. |
author_sort |
Waldmann, Nicolas |
title |
Holocene climatic fluctuations and positioning of the Southern Hemisphere westerlies in Tierra del Fuego (54° S), Patagonia |
title_short |
Holocene climatic fluctuations and positioning of the Southern Hemisphere westerlies in Tierra del Fuego (54° S), Patagonia |
title_full |
Holocene climatic fluctuations and positioning of the Southern Hemisphere westerlies in Tierra del Fuego (54° S), Patagonia |
title_fullStr |
Holocene climatic fluctuations and positioning of the Southern Hemisphere westerlies in Tierra del Fuego (54° S), Patagonia |
title_full_unstemmed |
Holocene climatic fluctuations and positioning of the Southern Hemisphere westerlies in Tierra del Fuego (54° S), Patagonia |
title_sort |
holocene climatic fluctuations and positioning of the southern hemisphere westerlies in tierra del fuego (54° s), patagonia |
publisher |
Wiley |
publishDate |
2010 |
url |
https://doi.org/10.1002/jqs.1263 |
genre |
Antarc* Antarctic ice core Tierra del Fuego |
genre_facet |
Antarc* Antarctic ice core Tierra del Fuego |
op_relation |
Journal of Quaternary Science--J. Quat. Sci.--journals:1767--0267-8179--1099-1417 eawag:6515 journal id: journals:1767 issn: 0267-8179 e-issn: 1099-1417 ut: 000283697100003 local: 14676 scopus: 2-s2.0-77958109584 doi:10.1002/jqs.1263 |
op_doi |
https://doi.org/10.1002/jqs.1263 |
container_title |
Journal of Quaternary Science |
container_volume |
25 |
container_issue |
7 |
container_start_page |
1063 |
op_container_end_page |
1075 |
_version_ |
1810490007129948160 |